@misc{KodalleMalekshahiByranvandGoudreauetal., author = {Kodalle, Tim and Malekshahi Byranvand, Mahdi and Goudreau, Meredith and Das, Chittaranjan and Roy, Rajarshi and Kot, MaƂgorzata and Briesenick, Simon and Zohdi, Mohammadreza and Rai, Monika and Tamura, Nobumichi and Flege, Jan Ingo and Hempel, Wolfram and Sutter-Fella, Carolin M. and Saliba, Michael}, title = {An integrated deposition and passivation strategy for controlled crystallization of 2D/3D Halide Perovskite films}, series = {Advanced Materials}, volume = {36}, journal = {Advanced Materials}, number = {24}, publisher = {Wiley}, address = {Weinheim}, issn = {0935-9648}, doi = {10.1002/adma.202309154}, pages = {12}, abstract = {This work introduces a simplified deposition procedure for multidimensional (2D/3D) perovskite thin films, integrating a phenethylammonium chloride (PEACl)-treatment into the antisolvent step when forming the 3D perovskite. This simultaneous deposition and passivation strategy reduces the number of synthesis steps while simultaneously stabilizing the halide perovskite film and improving the photovoltaic performance of resulting solar cell devices to 20.8\%. Using a combination of multimodal in situ and additional ex situ characterizations, it is demonstrated that the introduction of PEACl during the perovskite film formation slows down the crystal growth process, which leads to a larger average grain size and narrower grain size distribution, thus reducing carrier recombination at grain boundaries and improving the device's performance and stability. The data suggests that during annealing of the wet film, the PEACl diffuses to the surface of the film, forming hydrophobic (quasi-)2D structures that protect the bulk of the perovskite film from humidity-induced degradation.}, language = {en} }